基于PXA270的无线传感器网络汇聚节点设计与实现

【作者】 于超；

【导师】 李士宁；

【作者基本信息】 西北工业大学 ， 计算机科学与技术， 2007， 硕士

【摘要】 现代传感器技术、计算机技术和无线通信等技术的进步，推动了具有现代意义的无线传感器网络的产生和发展。一个典型的无线传感器网络从硬件上通常包括传感器节点、汇聚节点(网关节点)和管理节点。其中，汇聚节点用于将从各个传感器节点得到的数据进行融合、以及负责与外界的通信，它是基于嵌入式系统来实现的。 本文以建立一个实用的无线传感器网络汇聚节点为背景，结合国家自然科学基金“感知任务适应性分配策略与实现机制研究”，深入研究了传感器网络的硬件设计原则与节能机制，采用高速数字电路设计原理与嵌入式系统设计流程，设计并实现了汇聚节点。论文主要分为三个部分： 1．系统的总体设计：在传感器网络的应用特点基础上，分析了汇聚节点的功能需求与设计原则，讨论了嵌入式系统中软硬件协同设计的流程，从而确定了实现一个功能完善的汇聚节点的概要设计。 2．系统的硬件实现：首先确定各个硬件模块的选型，并设计出电路原理图；然后在分析高速数字电路设计中信号完整性和电磁兼容的基础上，设计出PCB图；最后制作出样品并通过了硬件调试。 3．系统的软件实现：分析了一个通用嵌入式系统的软件系统构成，包括Bootloader的完整实现、Linux移植和驱动程序设计等，最后在汇聚节点的硬件平台上进行了实现与测试。更多还原

【Abstract】 The advances of modern sensor technology, computer technology and wireless communications promote the modern significance of the birth and development of wireless sensor networks. Typical wireless sensor network hardware usually includes sensor nodes, sink node (gateway node) and task manager node. The function of sink node is integrating data from each sensor node and communicating with the outside world. It is implemented based on the embedded system.Based on how to establish a practical wireless sensor network sink node and the NSFC project of "Research on task assignment policies and implementation mechanisms in wireless sensor network", this thesis focuses on the sensor network hardware design principles and energy-saving mechanism, and designs and implements a sink node using high-speed digital circuit design theories and embedded system design process,. This thesis is divided into three parts:1. System outline design: the functional requirements and design principles of sink node is analyzed, which is based on the application of the sensor network and discuss the embedded system hardware and software co-design process. Then, an outline design of sink nodes is created accordingly.2. System hardware: all the hardware module selection and design circuit diagram are identified firstly. Then based on signal integrity and EMC in a high-speed digital circuit, PCB is designed. Finally samples are produced which can get through the hardware debugging.3. System software: general embedded system software components, which include the implement of boot loader and Linux transplantation and driver design, are analyzed. These components are implemented and tested on sink node.更多还原